java ɾ³ýÎļþ¼°Ä¿Â¼

javaÖÐɾ³ýĿ¼ÊÂÏÈҪɾ³ýĿ¼ÏµÄÎļþ»ò×ÓĿ¼¡£Óõݹé¾Í¿ÉÒÔʵÏÖ¡£
public void del(String filepath) throws IOException{
File f = new File(filepath);//¶¨ÒåÎļþ·¾¶        
if(f.exists() && f.isDirectory()){//ÅжÏÊÇÎļþ»¹ÊÇĿ¼
    if(f.listFiles().length==0){//ÈôĿ¼ÏÂûÓÐÎļþÔòÖ±½Óɾ³ý
        f.delete();
    }else{//ÈôÓÐÔò°ÑÎļþ·Å½øÊý×飬²¢ÅжÏÊÇ·ñÓÐϼ¶Ä¿Â¼
        File delFile[]=f.listFiles();
        int i =f.listFiles().length;
        for(int j=0;j<i;j++){
            if(delFile[j].isDirectory()){
                      del(delFile[j].getAbsolutePath());//µÝ¹éµ÷ÓÃdel·½·¨²¢È¡µÃ×ÓĿ¼·¾¶
            }
            delFile[j].delete();//ɾ³ýÎļþ
        }
    }
    del(filepath);//µÝ¹éµ÷ÓÃ
}